A-LevelBiologyNucleic acids and protein synthesis9700/12 · Oct/Nov 2025 · Q251 Mark
In a gene, the 20 common amino acids are each coded for by three bases in adjacent nucleotides. Why is there a difference between the number of amino acids and the number of possible triplet codes?
A44 triplets have no functions.
BSome amino acids are coded for by more than one triplet.
CSome triplets have unknown functions.
DThere are 44 'start' and 'stop' triplets.
✓ Correct answer
B: Some amino acids are coded for by more than one triplet.
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